The atmospheric carbon dioxide concentration A) is higher than ...

[hubes95]

The atmospheric carbon dioxide concentration
 
  A) is higher than it has been at any time during the last 800,000 years
  B) is higher than it has been at any time during the Earth's history
  C) has remained roughly constant during the last 800,000 years
  D) is lower than it has been at any time during the last 800,000 years

Question 2

A spring-driven dart gun propels a 10. g dart. It is cocked by exerting a force of 20. N over a distance of 5.0 cm. With what speed will the dart leave the gun, assuming the spring has negligible mass?
 
  What will be an ideal response?

[lauravaras]

Answer to Question 1

A

Answer to Question 2

10. m/s

[hubes95]

Thanks

[lauravaras]

Welcome